Wholesale 553 # ferrosilicon silicon metal fume 2202 Chemical composition: si> 99.5% fe≤0.2 al≤0.2 ca≤0.02 p≤0.004% 3303 Grade Chemical composition: si> 99.3% fe ≤0.3 al≤0.3 ca≤0.03 p ≤0.005% 441 Grade Chemical Ingredients: si> 99.0% fe ≤0.4 al≤0.4 ca≤0.1 553 Grade Chemical Ingredients: si> 98.5% fe ≤0.5 al≤0.5 ca≤0.3 421 Grade Chemical Ingredients: si> 99.2% fe ≤ 0.4 al <0.2 ca≤0.1 411 Grade Chemical Ingredients: si> 99.2% fe ≤0.4 al≤0.1 ca≤0.1 Name: Silicon Metal Packaging: ton bag Appearance: silver gray massive weight: 1000 kg gross weight: 1003 kg Origin: Anyang, Fujian, Yunnan silicon metal Definition: Also known as crystalline silicon or silicon metal industrial silicon, its main use is as a non-iron-based alloy additives. Note: Call for details prevail!